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Lattice-distortion-enhanced electron-phonon coupling and Fermi surface nesting in 1<i>T</i>-TaS<sub>2</sub>
Auteur(s)
Clerc, Florian
Battaglia, Corsin
Bovet, M
Despont, Laurent
Monney, Claude
Cercellier, Hervé
Garnier, Michael Bernard Gunnar
Aebi, Philipp
Berger, Helmuth
Forró, László
Date de parution
2006
In
Physical Review B, American Physical Society (APS), 2006/74/155114/1-7
Résumé
The temperature dependence of the electronic structure of the quasi-two-dimensional material 1<i>T</i>-TaS<sub>2</sub> is revisited by considering angle-resolved photoemission spectroscopy (ARPES) and density functional theory to calculate the imaginary part of the static electronic susceptibility characterizing the nesting strength. While nesting appears to play a role in the high temperature phase, the ARPES line shapes reveal peculiar spectral properties which are not consistent with the standard two-dimensional Peierls scenario for the formation of a charge density wave. The temperature dependence of these anomalous spectral features suggests a lattice-distortion enhanced electron-phonon interaction.
Identifiants
Type de publication
journal article
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